کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7935144 1513049 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photovoltaic-targeted photoluminescence lifetime engineering in bright type-II alloy quantum dots
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Photovoltaic-targeted photoluminescence lifetime engineering in bright type-II alloy quantum dots
چکیده انگلیسی
A crucial issue faced by quantum dot solar cells (QDSC) is how to achieve a quantum dot material with high photoluminescence (PL) quantum yield and long excited state lifetime at the same time to maximize charge carrier collection efficiency. Here, we present a new type of Zn0.9Cd0.1S/ZnSe hetero-nanocrystals that have a staggered band alignment, i.e., a type-II structure by which the wave function overlap between electrons and holes is reduced, thereby leading to a significant enhancement in the PL lifetime. The resultant QD also exhibits a QY up to 75.4%, which is, to the best of our knowledge, the highest one for a type-II QD to date. In particular, we explore the underlying relationship between the broad tunability and energy level alignment of these hetero-nanocrystals, and we highlight the properties that have delivered QDSCs and light-emitting diodes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy - Volume 169, 15 July 2018, Pages 75-83
نویسندگان
, , , , , , , ,